On Wednesday 23 Aug 2017 14:52:43 Clemens Ladisch wrote: > Keith A. Milner wrote: > >>> kernel: [ 1987.452947] usb 1-1: Unable to change format on ep #8e: > >>> already in use> > > So the error messages are due to a userspace app trying to open playback > > and capture at the same time? > > For this device, playback requires a running capture stream to determine > the rate of packets. This error happens when the application tries to > open the capture stream after the playback stream. (If the format does > not actually need to change, the error message is misleading.) > > Your actual problem is that the device does not send any capture packets. Thank you for the clarification. Hopefully I will find some time to explore this further. Cheers, Keith _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
